Vial



FIG. 1 is a perspective view of a vial showing my new design;

FIG. 2 is a front elevation thereof, the rear being substantially similar in appearance;

FIG. 3 is a right side elevation thereof, the left side being a mirror image;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a vial, as shown and described. 